Medically reviewed by Marla Anderson, MD Breast cancer is a type of cancer that starts growing in the breast tissue.

This page is about stage 1 cancer, which is part of the number staging system. This system has 5 stages - high grade dysplasia (stage 0) to stage 4. This page also tells you what stage 1 means in the ...

This page is about stage 3 cancer, which is part of the number staging system. This system has 4 stages, stage 1 to stage 4. This page also tells you what stage 3 means in the TNM system. This system ...

Several different staging systems for non-small cell lung cancer (NSCLC) are used worldwide, but the most widely used approach is the TNM system. A staging system helps doctors determine the best ...